// vi:set ft=javascript ff=dos ts=4 sts=4 sw=4 et:

// ==PREPROCESSOR==
// @name "Volbar with GdiDrawText"
// @author "T.P Wang"
// ==/PREPROCESSOR==

// Flags, used with GdiDrawText
// For more information, see: http://msdn.microsoft.com/en-us/library/dd162498(VS.85).aspx
var DT_TOP = 0x00000000;
var DT_LEFT = 0x00000000;
var DT_CENTER = 0x00000001;
var DT_RIGHT = 0x00000002;
var DT_VCENTER = 0x00000004;
var DT_BOTTOM = 0x00000008;
var DT_WORDBREAK = 0x00000010;
var DT_SINGLELINE = 0x00000020;
var DT_EXPANDTABS = 0x00000040;
var DT_TABSTOP = 0x00000080;
var DT_NOCLIP = 0x00000100;
var DT_EXTERNALLEADING = 0x00000200;
var DT_CALCRECT = 0x00000400;
var DT_NOPREFIX = 0x00000800;
var DT_INTERNAL = 0x00001000;
var DT_EDITCONTROL = 0x00002000;
var DT_PATH_ELLIPSIS = 0x00004000;
var DT_END_ELLIPSIS = 0x00008000;
var DT_MODIFYSTRING = 0x00010000;
var DT_RTLREADING = 0x00020000;
var DT_WORD_ELLIPSIS = 0x00040000;
var DT_NOFULLWIDTHCHARBREAK = 0x00080000;
var DT_HIDEPREFIX = 0x00100000;
var DT_PREFIXONLY = 0x00200000;

function RGB(r, g, b) {
    return (0xff000000 | (r << 16) | (g << 8) | (b));
}

var g_font = gdi.Font("Tahoma", 12, 0);
var g_drag = 0;

function on_paint(gr) {
    var ww = window.Width;
    var wh = window.Height;
    var volume = fb.Volume;
    var pos = window.Width * ((100 + volume) / 100);
    var txt = (Math.ceil(volume)) + "dB";
    gr.FillGradRect(0, 0, pos, wh, 90, RGB(240, 240, 240), RGB(100, 230, 100));
    gr.FillGradRect(pos, 0, ww - pos, wh, 90, RGB(240, 240, 240), RGB(190, 190, 190));
    gr.GdiDrawText(txt, g_font, RGB(64, 64, 128), 0, 0, ww, wh, DT_CENTER | DT_VCENTER | DT_SINGLELINE);
    gr.DrawRect(0, 0, ww - 1, wh - 1, 1.0, RGB(150, 150, 150));
}

function on_mouse_lbtn_down(x, y) {
    g_drag = 1;
}

function on_mouse_lbtn_up(x, y) {
    on_mouse_move(x, y);
    g_drag = 0;
}

function on_mouse_move(x, y) {
    if (g_drag) {
        var v = x / window.Width;
        v = (v < 0) ? 0 : (v < 1) ? v : 1;
        v = -100 * (1 - v);
        if (fb.Volume != v) fb.Volume = v;
    }
}

function on_mouse_wheel(delta) {
    if (delta > 0) fb.VolumeUp();
    else fb.VolumeDown();
}

function on_volume_change(val) {
    window.Repaint();
}
